Polymeric and Ceramic Membranes


Aqua-Aerobic Systems provides two types of Aqua MultiBore® membranes, polymeric and ceramic. The type of membrane used in an application is dependent on waste characteristics, treatment objectives and the best economic solution for the plant.



Aqua MultiBore® P-Series

Polymeric Membranes

The Aqua MultiBore polymeric membrane has been successfully applied in both water and wastewater including high solids applications.


Multibore® P-Series

How It Works


Multibore® P-Series Filtration Mode

Filtration Mode

  • During top filtration, influent enters the top of each membrane module and flows down through each fiber bore
  • The 0.02 µ pores allow water to pass through to the outside of the fiber but retain suspended solids, bacteria, cysts, and viruses
  • During bottom filtration, influent enters the bottom of each module and flows up through the fiber bores
  • The system alternates between top and bottom filtration to evenly distribute impurities along the entire fiber length
  • In both filtration modes, filtered water flows from the outside of the fibers through the filtrate port on the side of the module

Multibore® P-Series Backwash Mode

Backwash Mode

  • During both the top and bottom backwash modes, filtered water enters the filtrate port on the side of each membrane module and flows into each fiber
  • During top backwash, water flows down through the fiber bores, into the bottom of the module and out to drain
  • During bottom backwash, water flows up through the fiber bores, into the top of the module and out to drain
  • The system alternates between top and bottom backwash so that impurities collected at both module ends can be efficiently flushed out
  • Backwash occurs every 20 – 80 minutes, depending on influent quality

Multibore® P-Series CEB Mode

Chemically-Enhanced Backwash (CEB) Mode

  • Chemicals are periodically added to the backwash water to dissolve any impurities that were not removed during the backwash modes
  • The flow paths are the same as during backwash, only small amounts of chemical are injected into the filtrate prior to entering the modules
  • Caustic is used to dissolve organics, acid is used to dissolve inorganic matter, and chlorine is used for occasional disinfection
  • The membranes are soaked in the chemical for 10-20 minutes before being flushed out
  • A CEB is performed every 8 -168 hours, depending on influent quality


Features & Specifications

  • Large diameter bores
  • 0.02 μ UF membrane is rated for 4 log virus removal
  • Each fiber is made from one material in a single process
  • Inside-outside flow path requires no air scour
  • Low fouling, can be cleaned with wide pH range (1-13)
  • Superior strength – No fiber breaks!

Benefits

  • Less chemical usage
  • High water recover rate
  • Low energy consumption
  • High Permeability
  • No basins or lifting equipment required
  • Simple operation and low maintenance


Aqua MultiBore® C-Series

Ceramic Membranes

The Aqua MultiBore® C-Series ceramic membranes have been successfully applied in both water and wastewater applications with more than 140 installed systems from pretreatment to advanced treatment of drinking water.


Multibore® C-Series

How It Works


Multibore® C-Series Filtration Mode

Filtration Mode

  • During filtration, influent enters from the bottom of each membrane module and flows up through each ceramic filtration cell
  • The 0.1 µ pores allow water to pass through to the ceramic filtrate collection cells
  • Collected filtrate then exits the membrane through the filtrate port on the side of the module

Multibore® C-Series Backwash Mode

Backwash Mode

  • During backwash, filtered water enters the filtrate port on the side of each membrane module and flows into each filtration cell
  • 70 psi filtrate detaches fouling matter within the filtration cells
  • Most impurities are collected at the bottom of the module and efficiently flushed out
  • Typical backwash occurs every 4 to 12 hours

Multibore® C-Series Airflush Mode

Airflush Mode

  • Compressed air is injected into the top of the membrane sub-module to remove any remaining impurities that were not removed during the backwash mode
  • Airflush typically takes 2-5 seconds at a maximum pressure of 30 psi
  • The system is then placed back into normal filtration mode


Features & Specifications

  • Membrane is constructed with very uniform 0.1 μ pores resulting in high fluxes
  • Each ceramic membrane is made from one material in a single process
  • Inside-outside flow path
  • Resistant to pressure, heat and corrosion
  • High mechanical strength – No membrane breaks!
  • Low environmental impact – used membranes can be recycled
  • Backwashed with a short blast of filtrate and air, resulting in very high recoveries

Benefits

  • Less chemical usage
  • High water recover rate
  • Low energy consumption
  • High Permeability
  • No basins or lifting equipment required
  • Simple operation and low maintenance

Aqua MultiBore Ceramic Membranes at Butte, MT



Related Resources


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VideoAqua-Aerobic Systems, Inc. Overview Video

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Success StoryButte, MTAqua MultiBore® C-Series Ceramic Membrane System Solves Disinfection By-Product (DBP) Challenge at Butte-Silver Bow, Montana

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